Machine for bending corrugations in metal



June 2, 1931.

L. F. CLAUSING MACHINE FOR BENDING CORRUGATIONS IN METAL Filed April 15, 1929 3 Sheets-Sheet 1 INVENTOR Lou/6 F CLAUs/Nz;

A TTORNE YS.

June 2, 1931. L. F. CLAUSING 1,808,019

IACHINE FOR BENDING CORRUGATIONS IN IETAL Filed April 15. 1929 3 Sheets-Sheet 2 6 19 '21 22 z r a 1 l 4 4 p :5 h Figs 5a n a: INVENTOR. 1K Llau/s/ L,.4u.suva.

6 BY :u

ATTORNEYS.

June 2, 1931. L. F. cLAusiNG CHINE FOR BENDING CORRUGATIONS IN IETAL Filed April 15; 1929 3 Sheets-Sheet 3 w pm m w 7 F I C 1 z m o w w m M, 7 E .O O Z 2 INVENTOR.

BY Lou/JA 6L41/6/N6,

A TTORNE YS..

Patented June 2, 1931 UNITED STATES PATENT oFFicE LOUIS F. CLAU SING, OF BURLINGAME, CALIFORNIA, ASSIGNOR 'IO ROYAL METAL WORKS, OF SAN FRANCISCO, CALIFORNIA, A COIPAETNERSHIP CONSISTING OF LOUIS F. CLAUSING AND MAX SCHWARTZ MACHINE Eon BENDING CORRUGATIONS IN METAL Application filed April 15,

The present invention relates to improvements in means for bending corrugations into. sheet metal, and its principal object is to provide a novel means for corrugating sheet metal where the corrugations are so deep and close that the corrugations cannot be made and would prevent movement of the roll altogether.

In the present invention, a convenient means is disclosed for bending corrugations of any desired depth into sheet metal, the

3 operations being preferably carried on by hand.

Further objects and advantages of my invention will appear as the specification proceeds.

The preferred form of my invention is illustrated in the accompanying drawings, in which:

Figure 1 shows a top plan view of my invention;

Figure 2 a vertical section taken along line 2-2of Figure 1;

Figure 3 a front View of my machine;

Figure 4 a. horizontal section taken along line 4-4 of Figure3;

Figure 5 a detail section of-a guide along line 5-5 of Figure 2; Figure 6 an enlarged horizontal section taken along line 6-6 of Figure 3';

Figure 7 a perspective detail view of a bending blade used in my device; and

Figure 8 a perspective view of corrugated sheet metal as formed by my device. I

While I have shown only the preferred form'of'my invention, I wish tohave it understood that various changes or modifications may be made within the scope ofthe claims hereto attached, withoutdeparting from the spirit of the invention.

In its preferred form, my invention comprises a suitable framework, preferably taken- 1929. Serial no. 355,270.

tapered from front to rear inplan, as shown in Figure 1, and comprising, in its principal features, a front frame 1, two'side frames 2 and 3, and a rear frame 4, these frames being upright, of any suitable construction, and joined at the corners. In close proximity'to the rear frame 4 and on the center line of the entire framework, there is mounted a vertical rod 6, to which is secured a guide 7 'extending forwardly along the center lineof the framework so as to-be capable'of lateral motion, the front end of'the said guide being limited in its lateral motion by two stops 8 extending rearwardly from the front frame. This guide is shown in cross-section in Figure 5 and consists of a sheet of metal, indicated at 9, having its upper and lower e'nds 11 bent downward and upward, respectively, so that the sheet 12, which is'to be corrugated, may be supported thereby. The guide may be suitably reinforced by'one or more'angleirons, shown at 13.

The front of the framework consists oftwo parallel frames- 14and 16, forming between the same a guideway shownat 17 in Figure 1. The sheet of metal to be worked on is guided by the guide 7 to cross the'g'uideway 17 between the two stops 8 and is bent into corrugations while crossing this guideway.

For bending the corrugations into'the sheet metal, I provide two blades 18, one of which is shown in detail in Figure 7 ,theblades being substantially of the same height as the V framework and presenting spindles 19 at the top and bottom,these spindles being revolv- V ably mounted in bearings 21, which latter-are slidable in'the upper and lower guideways' 17 so that each blade may be moved forward and backwardthat is, toward and away from the sheet to be corrugated.

For moving each blade in its guideway, I use toggle. joints 22, one at the top and one at the bottom, each consisting of two links, one of which is fixed to a vertical shaft23 adaptedtobe operated by means of a handle 24. Referring to Figure 1, it will be seen that either one of the blades indicated-at 18 may be moved away from the sheet of metal to be corrugated byamovement of the handle 24 toward the sheet and may be moved toward the sheet to be corrugated by a movement of the handle 24 away from the sheet.

Each of the blades 18 has a handle 26 fixed thereto, so that each blade may be turned in its bearing by operationof the handle 26. Each blade is suitably reinforced by bracing elements 27.

The two front frames are spaced from one another 'bymeans of angle-irons 28, and these angle-irons support a number of rods 29, three being shown on each side in Figure 3, these rods extending into the guideway almost to the center thereof and being bent cycle requires siX major operations.

center two spaced Vertical bars 34 and 36 made to enter the corrugations already formed at a certain period for temporarily arresting forward movement of the corrugated metal. This frame is operated to move back and forth in front of the guideway 17 by the blades 18, which, when moved away from the,

sheet metal, bear on brackets 37 fastened to the movable frame 32.

The operation of the device will probably be best understood by reference to the plan view in Figure 1 and the horizontal sections of Figure 4 and Figure 6. In all three .v1ews,

the same situation is presented. A nunbe of corrugations have already been formed, and a. section of the sheet is still nthe gu de 7. One of the blades 18 1s shown as being confined between the two flanges of the last coringation formed, while the other blade bears against the outer flange of the last-cor rugation. .The two bends of the last two corrugations bearagainst the abutments 29, and the handles are in the position 1nd1cated in Figure 1. 1

The operation of-the device requires two men standingon opposite sides of the device, each operating two handles. A complete 7 Calling the two operators, A and B,estanding at the places indicated in Figure 1, a complete cycle of operations may be described as follows:

- 1. A pushes the handle 24 toward the center, thereby withdrawing his blade 18. from the last corrugation. This movement is carried to its extreme end, sothait the blade 18 is practically at the outer end of the gu1deway l't', and when this position has been reached, the operator turns the handle 26 to the left, as viewed in Figure 1, so that the blade now occupies a position at right angles to the guideway 17 In moving to the outer endofthe guideway, the blade has also, through its engagement with the bracket 37, (see Figure 4), pushed the frame 32' over to As side, which causes the bar 36tof be withdrawn from the third to the last corrugation, (see Figure6), and has caused the bar 34 to enter the second to the last corrugation, squeezing its way between the two corrugations shown as touching in Figure 6. r 3

2. Now B'operates his handle 26 by urging the same to the right, as shown in F igure 1, whereby his blade 18 is made to complete the last bend which, in the drawing, is shown as only partly completed, so that now Bs blade 18 occupies a position at least parallel with the guideway and probably slightly inclined in the opposite direction. It should be noted that during this operation, the bar 34, urged into the second to the last fold during operation number 1, holds the last corrugation against forward travel and allows the bending operation to be performed.

3. Operator A now pulls his handle 24 backward into the position shown in Figure 1, whereby the blade is advanced again and comes in contact with the last bend. It

should be observed that during this forward.

movement, the blade still is in a transverse position, so as to lie flat against the last bend at the end of its movement. During this for-. ward movement, the slots 31 in the blade allow the three abutments 29 to be cleared. At the end of its forward movement, the transverse blade is in line with the inner ends of the abutment-s 29 and pushes against. the last bend formed for properly positioning the same in case it should have become slightly disaligned during the previous operation.

When the end of the forward movement has been reached, A turns the handle 26 so as to force a new bend into the material, this motion being only partly executed fort-he time being because the presence of the other blade'prevents a complete execution of the turning movement, as-will appear from the drawings.

At the end of thesethree-operations, the situation shown in Figure 1 is completely reversed and it is now up to B to make the next move. l L

4. B pushes his handle 24 toward the cen ter, thereby withdrawing his blade from the corrugation, and after the end of this move ment has been reached, he turns his handle 26; to the left, '(see Figure 1), thereby causing the blade to assume a transverse posi tion relative to the guideway'17. "During the outward movement of the-blade, the frame 32 shifted to Bs side so thatthe bar 34 is withdrawn from its corrugation and the bar 36 is drawn into the next corrugation.

5. A completes the turning movement of his blade by operation of the handle 26.

6. B pulls the handle 24: for advancing the blade toward the last bend in the corrugation, and upon arrival at that point, initiates the turning movement of the blade by drawing the handle 26 toward himself.

At this time, a complete cycle of operations has been performed and all the parts are back in their original position.

In actual practice, these operations may be performed very quickly by proper co operation of skilled workmen, and to give a clearer picture, the operations may be more summarily described as follows:

1. A pushes handle 24 toward the center, then turns 26 to the left.

2. B completes turning movement of his handle 26.

3. A pulls handle 24 toward himself and initiates turning movement of handle 26.

4. B pushes handle 24 toward the center and pushes handle 26 to the left.

5. A completes turning movement of handle 26, and

6. B pulls handle 24 toward himself and initiates turning movement of handle 26.

I claim:

1. A device for corrugating a sheet of metal or the like, comprising means for mounting the sheet and blades pivoted adjacent the sheet on opposite sides thereof for successively bending the sheet in opposite directions when the blades are turned on their pivots.

2. A device for corrugating a sheet of metal or the like, comprising means for mounting the sheet with freedom of sliding motion and blades retractably pivoted adjacent to the sheet and on opposite sides thereof for corrugating and advancing the sheet as the blades are alternately turned against the sheet and withdrawn.

3. A device for corrugating a sheet of metal or the like, comprising means for mounting the sheet with freedom of sliding motion, blades pivoted on opposite sides of the sheet, means for moving the blades toward and away from the sheet, and means for turning the blades on their pivots.

4. A device for corrugating a sheet of metal or the like, comprising means for mounting the sheet with freedom of sliding motion, blades pivoted on opposite sides of the sheet, means for moving the blades toward and away from the sheet, means for turning the blades on their pivots for bending corrugations into the sheet, and stationary abutments for the last corrugations formed for preventing lateral shifting of the work.

5. A device for corrugating a sheet of metal or the like, comprising means for mounting the sheet with freedom of sliding motion, blades pivoted on opposite sides of the sheet, means for moving the blades toward and away from the sheet, means for turning the blades on their pivots for bending corrugations into the sheet, and means for arresting movement of the sheet during the bending operation.

6. A device for corrugating a sheet of metal or the like, comprising means for mounting the sheet with freedom of sliding motion, blades pivoted on opposite sides of the sheet, means for moving the blades toward and away from the sheet, means for turning the blades on their pivots for bending corrugations into the sheet, and means for arresting movement of the sheet during the bending operation, the latter means being associated with the blade-moving means so as to be operated thereby.

7. In a device of the character described, means for successively bending corrugations into a sheet of metal beginning from one end thereof, and a guide for feeding the sheet into said means, the said guide being pivoted at its far end so as to allow the feeding end of the guide to shift back and forth as corrugations are bent into the sheet.

8. In a device for corrugating a sheet of metal, means for supporting the sheet, a blade, means for advancing the same toward the sheet including means for locking the blade in its advanced position in adjacent relation to the sheet, and means for turning the blade into the sheet for bending the latter.

9. In a device for corrugating a sheet of metal, a guide for supporting the sheet on edge with freedom of sliding motion, a guideway arranged transversely to the guide, and means movable in the guideway for bending corrugations into the sheet and for drawing the sheet through the guideway.

LOUIS F. CLAUSING. 

